irritation vs aggression

irritation and aggression both are nouns.

Word	Noun	Adjective	Verb	Adverb
irritation	Yes	No	No	No
aggression	Yes	No	No	No

As nouns, aggression is a hypernym of irritation; that is, aggression is a word with a broader meaning than irritation:

irritation (noun)	aggression (noun)
unfriendly behavior that causes anger or resentment	violent action that is hostile and usually unprovoked
the act of troubling or annoying someone	deliberately unfriendly behavior
an uncomfortable feeling of mental painfulness or distress	the act of initiating hostilities
a sudden outburst of anger	a disposition to behave aggressively
the psychological state of being irritated or annoyed	a feeling of hostility that arouses thoughts of attack
the neural or electrical arousal of an organ or muscle or gland
(pathology) abnormal sensitivity to stimulation